Was climbing on the Grand Sentinel yesterday and witnessed a large rockfall/slide around noon that started in one of the deep snow gullies coming from Pinnacle Peak. The slide, which had fridge size blocks in it, took out a good part of the upper approach trail (contouring NW from Sentinel Pass). It would have fatal if there were people on the trail at the time.
Although its a bit longer, dropping down into Paradise Valley and then hiking up underneath the Sentinel is a much safer option. It is however a bit of a grunt as there isn't much of a defined trail to follow.
Have fun and play safe!
Cheers
Mike Stuart
Alpine Guide
Alpine Guide